| Business | Phone |
| Architechnics Inc Po Box 841, Hannibal 63401 | (573) 248-3375 |
| Kettelkamp Architect 7 Melgrove Ln # 203, Hannibal 63401 | (573) 221-1920 |
| Klingner & Assoc 3318 Market St, Hannibal 63401 | (573) 221-0020 |
| Poepping Stone Bach & Assoc 801 Broadway # 224, Hannibal 63401 | (573) 406-0541 |